1. Simple Machines
Some provide a mechanical
advantage to help do work with less
effort.

2. Lever
• Two parts to the lever are the bar and fulcrum

3. Lever (cont.)
• The greater the distance between the fulcrum and
the effort, the easier the load can be moved.

4. Lever (cont.)
• The mechanical advantage is distance from
fulcrum to effort divided by the distance from
the fulcrum to the load.

5. Lever Examples

6. Wheel and Axle
• Two parts to this simple machine are the
wheel and axle.

7. Wheel and Axle (Cont.)
• The greater the diameter of the wheel, the
easier the load can be moved.

8. Wheel and Axle (Cont.)
• The mechanical advantage is the diameter of
the wheel divided by the diameter of the axle.

9. Wheel and Axle Examples